Introduction to Changshanwei Fort: Changshanwei Fort was built in the 56th year of Emperor Kangxi of the Qing Dynasty (1717). It is a pair of "sister forts" with the Dalaiwu Fort in Chenghai. They face each other and jointly guard the safety of Changshanwei Yang. .
The city corridor is rectangular, 60 meters long, 20 meters wide, 6 meters high, and the wall is 2 meters thick. The existing city gate is made of stone strips about 3 meters high and 2 meters wide, and is adjacent to the south and north. There are steps on each wall to climb the city, and there is a tall platform on the west side for placing cannons. Climbing the city and looking into the distance, you can have a panoramic view of Laiwu Mountain on the other side and Fengyu Island in the northwest sea.
In the nearby Qianlai Garden, there is the Yixia Pavilion overlooking the wind and the sea, and the cliff-climbing spiral staircase that uses the natural and dangerous rocks to climb up and look at the sea.